Malibu TDC Power 3000-0150-30 150 Watt Low Voltage Transformer, Photo Eye Sensor and Timer Converts 120 volt household electricity to a safe 12 volts Built-in photo eye sensor for auto turn on and off Fully programmable timer with Auto (dusk to dawn, 4 Hr, 6 Hr, 8 Hr, and 10 Hr schedules) Circuit Breaker Protection 150 Watt low voltage power pack